Can I use phalcon for all project type?

Hello, I am new to phalcon, I heard phalcon is the fastest PHP framework. So I wonder can I use phalcon in all the project, will it help website run faster than any other framework?

  • Phalconphp support cache good or not? My new plan project require a lot of cache/fetch data/API from other website, will phalcon is the best choice out of all ?
  • Can I use phalcon with mongodb?

Thank you all.

edited Nov '14

Phalcon support Mongodb good here link, Then many website built with Phalcon here